when I ordered my wrangler, the salesman I worked with knew I needed it on a schedule, and I've worked with him on a few vehicles orders and leases before.
So he was able to tell me what paints were being run at that time, and said could be as little as 4wks, or as much as 7wks.
If I had checked off another paint color, and it wasn't being run in the next month of two, it would be an untold wait.
As well, another problem I was warned about, is how they come off of the mass transport and into the holding yard/pen.
The first off, is put near the back of the pen.
the last off, at the front of the pen, and gets taken out and transported first.
If a few keep getting left at the back of the pen, it could get stuck with an untold delay.
The tracking for my last wrangler I ordered, was available on a Jeep website.